Home / 13,421.88-18,521.19-8,119.62

Finding the Fourth Proportional to 13,421.88, 18,521.19 and 8,119.62

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Solution

The fourth proportional to 13,421.88, 18,521.19 and 8,119.62 is: 11,204.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.88 : 18,521.19 = 8,119.62 : x
  2. Step 2: Convert to fraction form
    13,421.88/18,521.19 = 8,119.62/x
  3. Step 3: Cross multiply
    13,421.88x = 18,521.19 × 8,119.62
  4. Step 4: Simplify right side
    13,421.88x = 150,385,024.75
  5. Step 5: Solve for x
    x = 150,385,024.75/13,421.88
  6. Step 6: Final answer
    x = 11,204.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.